XHaffman: Encrypt and decrypt data using xor and compression

This class can be used to encrypt and decrypt data using xor and compression operations.

It can take a string of data and encrypt it by using the xor operation with values of the encryption key. The encrypted result is compressed with gzip and encoded again using the xor operation with the key.

The class can also decrypt a previously encypted string of data by performing the same operations in the reverse order.